1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Scrat [10]
3 years ago
9

Select the correct answer. Which statement is true according to the quantum model of the atom? A. When an electron drops down fr

om a high energy level to a lower one, light energy is emitted. B. When an electron jumps up from a low energy level to a higher one, light energy is emitted. C. Every orbit around the nucleus of an atom is the same energy level. D. After they emit light, electrons are sucked into the nucleus of the atom.
Chemistry
2 answers:
nalin [4]3 years ago
3 0
D: After they emit light, electrons are sucked into the nucleus of the atom.
aivan3 [116]3 years ago
3 0

Answer:

The correct statement is option a, that is, when an electron drops down from a high energy level to a lower one, light energy is emitted.

Explanation:

The energy is quantized that is every orbit exhibits a fixed energy value. When the absorption of heat takes place by the atom, the electrons go from low energy level to the high level of energy. However, when energy or heat is discharged by the atom then the electrons travel from the level of high energy to the level of low energy. As a consequence, this heat is discharged in the form of visible light. Therefore, of the given statements, the accurate statement is that when an electron drops down from a high energy level to a lower energy level, the emission of light takes place.

You might be interested in
=During digestion, water is both added and removed. Which area of the digestive system removes water?
saw5 [17]

Answer: Large intestine

Explanation:

5 0
2 years ago
Which mineral group is composed of compounds that contain atoms of sulfur and one or more metals?
Oksi-84 [34.3K]

Answer:

The answer to your questions is: C. Sulfides

Explanation:

A. Phosphates  these compounds do not have sulphur, they are composed by phosphate and oxygen, So this answer is wrong.

B. Sulfates  are formed by sulphur and oxygen, not for a metal, then this is not the right answer.

C. Sulfides  are molecules formed by a metal and sulphur, this is the anwser to the question.

D. Silicates are formed by sillicon and oxygen, this option is incorrect.

8 0
3 years ago
Combination (Synthesis) Reactions<br> pls help!
Ratling [72]

Answer: 1. CaO + H2O => Ca(OH)2

2. P4 + 5O2 => 2P2O5

3. 2 Ca + O2 => 2 CaO

4. 8 Cu + S8 => 8 CuS

5. CaO + H2O => Ca(OH)2

6. S8 + 8 O2 => 8 SO2

7. 3 H2 + N2 => 2 NH3

8. H2 + Cl2 =>2 HCl

9. 16 Ag + S8 => 8 Ag2S

10. Cr + O2 => 2Cr2O3

11. 2Al + 3Br2 => 2AlBr3

12. 2Na + I2 => 2NaI

13. 2H2 + O2 =>2 H2O

14. 4 Al + 3O2 => 2 Al2O3

Explanation:

4 0
3 years ago
Question 1
Nesterboy [21]
P waves are faster S wave are slower P waves can pass through both solids and liquids S waves bounce of solids
3 0
3 years ago
Read 2 more answers
Many computer chips are manufactured from silicon, which occurs in nature as SiO2. When SiO2 is heated to melting, it reacts wit
riadik2000 [5.3K]

Answer:

A) SiO2 is the limiting reactant

B) Theoretical yield= 72333.3g

C) % yield =91.5%

Explanation:

SiO2(s) + 2C(s) --------------> Si(s) + 2CO(g)

n(SiO2)= 155000/60 = 2583.33 mols

n(C)= 79000/12= 3291.66 mols

a)SiO2 is the limiting reactant

According to the balanced reaction equation,

60g of SiO2 produced 28g of SiO2

155000g of SiO2 will produce 155000×28/60= 72333.3g

Therefore theoretical yield of Si= 72333.3g

% yield= 66200/72333.3×100/1 =91.5%

5 0
3 years ago
Other questions:
  • WARMING OCEAN TEMPERAUTRE AFFECTS THE BIODIVERSITY OF ORGANISMS. WHICH OF THE FOLLOWING DISRUPTIONS WOULD YOU EXPECT TO SEE IN A
    15·1 answer
  • What is the average kinetic energy of 1 mole of gas at 102 degree celsius
    6·2 answers
  • Why does more evaporation happen from the oceans than from freshwater sources?
    6·2 answers
  • Indicate the number of significant figures in the measured number 5.80
    7·1 answer
  • Balanced complete ionic and net ionic equations
    11·2 answers
  • Identify the parts of an experiment in the scenario below.
    11·1 answer
  • Students mixed 20 mL of white glue and 20 mL of water in a cup. They added three drops of food coloring to the mixture. Then, 15
    7·1 answer
  • Ammonia reacts with oxygen to form nitrogen dioxide and water according to the
    11·1 answer
  • How would you find the mass of an object from its density and volume ?
    10·1 answer
  • Fill in the blanks
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!